Home / 107,615.20-161,320.40-83,909.60

Finding the Fourth Proportional to 107,615.20, 161,320.40 and 83,909.60

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Solution

The fourth proportional to 107,615.20, 161,320.40 and 83,909.60 is: 125,784.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,615.20 : 161,320.40 = 83,909.60 : x
  2. Step 2: Convert to fraction form
    107,615.20/161,320.40 = 83,909.60/x
  3. Step 3: Cross multiply
    107,615.20x = 161,320.40 × 83,909.60
  4. Step 4: Simplify right side
    107,615.20x = 13,536,330,235.84
  5. Step 5: Solve for x
    x = 13,536,330,235.84/107,615.20
  6. Step 6: Final answer
    x = 125,784.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.